During the early hours on Aug. 28, a WC-135C was spotted just to the South of the UK.

The aircraft was being refueled by a KC-135 tanker launched from RAF Mildenhall which met the “Sniffer” maybe out in the Atlantic.

The two WC-135 Constant Phoenix operated by the 45th Reconnaissance Squadron from Offutt Air Force Base, are an atmospheric collections aircraft used to detect the radioactive particles that result from a nuclear detonation.

They were deployed near North Korea in anticipation of Kim Jong Un rocket launches earlier this year.

The WC-135C Constant Phoenix is used to take air samples from possible nuclear explosions. The question is can it do the same for Chemical Weapons?

Someone speculates the aircraft carries sensor even capable to detect chemical substances down wind from the attack area days, or week after they were dispersed.

Another possibility is that the aircraft was either coming or going to monitor Fukushima radioactive leak.